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<li class="navelem"><a class="el" href="dir_6b3ae6988449b0834e9596fad5d75199.html">gpu</a></li><li class="navelem"><a class="el" href="dir_43be364029218a94c5bcb5d8c78d7156.html">test</a></li>  </ul>
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<div class="title">TestGpuSelect.cu</div>  </div>
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<div class="contents">
<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">/**</span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment"> * Copyright (c) 2015-present, Facebook, Inc.</span></div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment"> * All rights reserved.</span></div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment"> * This source code is licensed under the BSD+Patents license found in the</span></div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment"> * LICENSE file in the root directory of this source tree.</span></div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;</div>
<div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="comment">// Copyright 2004-present Facebook. All Rights Reserved.</span></div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;</div>
<div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="preprocessor">#include &quot;../utils/DeviceUtils.h&quot;</span></div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="preprocessor">#include &quot;../utils/BlockSelectKernel.cuh&quot;</span></div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="preprocessor">#include &quot;../utils/WarpSelectKernel.cuh&quot;</span></div>
<div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="preprocessor">#include &quot;../utils/HostTensor.cuh&quot;</span></div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="preprocessor">#include &quot;../utils/DeviceTensor.cuh&quot;</span></div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;<span class="preprocessor">#include &quot;../test/TestUtils.h&quot;</span></div>
<div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="preprocessor">#include &lt;algorithm&gt;</span></div>
<div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;<span class="preprocessor">#include &lt;gtest/gtest.h&gt;</span></div>
<div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;<span class="preprocessor">#include &lt;sstream&gt;</span></div>
<div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;<span class="preprocessor">#include &lt;unordered_map&gt;</span></div>
<div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;<span class="preprocessor">#include &lt;vector&gt;</span></div>
<div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;</div>
<div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;<span class="keywordtype">int</span> main(<span class="keywordtype">int</span> argc, <span class="keywordtype">char</span>** argv) {</div>
<div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;  testing::InitGoogleTest(&amp;argc, argv);</div>
<div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;  <span class="keywordflow">return</span> RUN_ALL_TESTS();</div>
<div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;}</div>
<div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;</div>
<div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;<span class="keywordtype">void</span> testForSize(<span class="keywordtype">int</span> rows, <span class="keywordtype">int</span> cols, <span class="keywordtype">int</span> k, <span class="keywordtype">bool</span> dir, <span class="keywordtype">bool</span> warp) {</div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;  std::vector&lt;float&gt; v = faiss::gpu::randVecs(rows, cols);</div>
<div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;  <a class="code" href="classfaiss_1_1gpu_1_1HostTensor.html">faiss::gpu::HostTensor&lt;float, 2, true&gt;</a> hostVal({rows, cols});</div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;</div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> r = 0; r &lt; rows; ++r) {</div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;    <span class="keywordflow">for</span> (<span class="keywordtype">int</span> c = 0; c &lt; cols; ++c) {</div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;      hostVal[r][c] = v[r * cols + c];</div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;    }</div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;  }</div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;</div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;  <span class="comment">// row -&gt; (val -&gt; idx)</span></div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;  std::unordered_map&lt;int, std::vector&lt;std::pair&lt;int, float&gt;&gt;&gt; hostOutValAndInd;</div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> r = 0; r &lt; rows; ++r) {</div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;    std::vector&lt;std::pair&lt;int, float&gt;&gt; closest;</div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;</div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;    <span class="keywordflow">for</span> (<span class="keywordtype">int</span> c = 0; c &lt; cols; ++c) {</div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;      closest.emplace_back(c, (<span class="keywordtype">float</span>) hostVal[r][c]);</div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;    }</div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;</div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;    <span class="keyword">auto</span> dirFalseFn =</div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;      [](std::pair&lt;int, float&gt;&amp; a, std::pair&lt;int, float&gt;&amp; b) {</div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;      <span class="keywordflow">return</span> a.second &lt; b.second;</div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;    };</div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;    <span class="keyword">auto</span> dirTrueFn =</div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;      [](std::pair&lt;int, float&gt;&amp; a, std::pair&lt;int, float&gt;&amp; b) {</div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;      <span class="keywordflow">return</span> a.second &gt; b.second;</div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;    };</div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;</div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;    std::sort(closest.begin(), closest.end(), dir ? dirTrueFn : dirFalseFn);</div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;    hostOutValAndInd.emplace(r, closest);</div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;  }</div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;</div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;  <span class="comment">// Select top-k on GPU</span></div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;  <a class="code" href="classfaiss_1_1gpu_1_1DeviceTensor.html">faiss::gpu::DeviceTensor&lt;float, 2, true&gt;</a> gpuVal(hostVal, 0);</div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;  <a class="code" href="classfaiss_1_1gpu_1_1DeviceTensor.html">faiss::gpu::DeviceTensor&lt;float, 2, true&gt;</a> gpuOutVal({rows, k});</div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;  <a class="code" href="classfaiss_1_1gpu_1_1DeviceTensor.html">faiss::gpu::DeviceTensor&lt;int, 2, true&gt;</a> gpuOutInd({rows, k});</div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;</div>
<div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;  <span class="keywordflow">if</span> (warp) {</div>
<div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;    faiss::gpu::runWarpSelect(gpuVal, gpuOutVal, gpuOutInd, dir, k, 0);</div>
<div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;    faiss::gpu::runBlockSelect(gpuVal, gpuOutVal, gpuOutInd, dir, k, 0);</div>
<div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;  }</div>
<div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;</div>
<div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;  <span class="comment">// Copy back to CPU</span></div>
<div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;  <a class="code" href="classfaiss_1_1gpu_1_1HostTensor.html">faiss::gpu::HostTensor&lt;float, 2, true&gt;</a> outVal(gpuOutVal, 0);</div>
<div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;  <a class="code" href="classfaiss_1_1gpu_1_1HostTensor.html">faiss::gpu::HostTensor&lt;int, 2, true&gt;</a> outInd(gpuOutInd, 0);</div>
<div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;</div>
<div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> r = 0; r &lt; rows; ++r) {</div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;    std::unordered_map&lt;int, int&gt; seenIndices;</div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;</div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;    <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; k; ++i) {</div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;      <span class="keywordtype">float</span> gpuV = outVal[r][i];</div>
<div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;      <span class="keywordtype">float</span> cpuV = hostOutValAndInd[r][i].second;</div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;</div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;      EXPECT_EQ(gpuV, cpuV) &lt;&lt;</div>
<div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;        <span class="stringliteral">&quot;rows &quot;</span> &lt;&lt; rows &lt;&lt; <span class="stringliteral">&quot; cols &quot;</span> &lt;&lt; cols &lt;&lt; <span class="stringliteral">&quot; k &quot;</span> &lt;&lt; k &lt;&lt; <span class="stringliteral">&quot; dir &quot;</span> &lt;&lt; dir</div>
<div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;                &lt;&lt; <span class="stringliteral">&quot; row &quot;</span> &lt;&lt; r &lt;&lt; <span class="stringliteral">&quot; ind &quot;</span> &lt;&lt; i;</div>
<div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;</div>
<div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;      <span class="comment">// If there are identical elements in a row that should be</span></div>
<div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;      <span class="comment">// within the top-k, then it is possible that the index can</span></div>
<div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;      <span class="comment">// differ, because the order in which the GPU will see the</span></div>
<div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;      <span class="comment">// equivalent values is different than the CPU (and will remain</span></div>
<div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;      <span class="comment">// unspecified, since this is affected by the choice of</span></div>
<div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;      <span class="comment">// k-selection algorithm that we use)</span></div>
<div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;      <span class="keywordtype">int</span> gpuInd = outInd[r][i];</div>
<div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;      <span class="keywordtype">int</span> cpuInd = hostOutValAndInd[r][i].first;</div>
<div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;</div>
<div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;      <span class="comment">// We should never see duplicate indices, however</span></div>
<div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;      <span class="keyword">auto</span> itSeenIndex = seenIndices.find(gpuInd);</div>
<div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;</div>
<div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;      EXPECT_EQ(itSeenIndex, seenIndices.end()) &lt;&lt;</div>
<div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;        <span class="stringliteral">&quot;Row &quot;</span> &lt;&lt; r &lt;&lt; <span class="stringliteral">&quot; user index &quot;</span> &lt;&lt; gpuInd &lt;&lt; <span class="stringliteral">&quot; was seen at both &quot;</span> &lt;&lt;</div>
<div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;        itSeenIndex-&gt;second &lt;&lt; <span class="stringliteral">&quot; and &quot;</span> &lt;&lt; i;</div>
<div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;</div>
<div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;      seenIndices[gpuInd] = i;</div>
<div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;</div>
<div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;      if (gpuInd != cpuInd) {</div>
<div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;        <span class="comment">// Gather the values from the original data via index; the</span></div>
<div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;        <span class="comment">// values should be the same</span></div>
<div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;        <span class="keywordtype">float</span> gpuGatherV = hostVal[r][gpuInd];</div>
<div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;        <span class="keywordtype">float</span> cpuGatherV = hostVal[r][cpuInd];</div>
<div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;</div>
<div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;        EXPECT_EQ(gpuGatherV, cpuGatherV) &lt;&lt;</div>
<div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;          <span class="stringliteral">&quot;rows &quot;</span> &lt;&lt; rows &lt;&lt; <span class="stringliteral">&quot; cols &quot;</span> &lt;&lt; cols &lt;&lt; <span class="stringliteral">&quot; k &quot;</span> &lt;&lt; k &lt;&lt; <span class="stringliteral">&quot; dir &quot;</span> &lt;&lt; dir</div>
<div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;                  &lt;&lt; <span class="stringliteral">&quot; row &quot;</span> &lt;&lt; r &lt;&lt; <span class="stringliteral">&quot; ind &quot;</span> &lt;&lt; i &lt;&lt; <span class="stringliteral">&quot; source ind &quot;</span></div>
<div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;                  &lt;&lt; gpuInd &lt;&lt; <span class="stringliteral">&quot; &quot;</span> &lt;&lt; cpuInd;</div>
<div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;      }</div>
<div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;    }</div>
<div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;  }</div>
<div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;}</div>
<div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;</div>
<div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;<span class="comment">// General test</span></div>
<div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;TEST(TestGpuSelect, test) {</div>
<div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; 10; ++i) {</div>
<div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;    <span class="keywordtype">int</span> rows = faiss::gpu::randVal(10, 100);</div>
<div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;    <span class="keywordtype">int</span> cols = faiss::gpu::randVal(1, 30000);</div>
<div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;    <span class="keywordtype">int</span> k = std::min(cols, faiss::gpu::randVal(1, 1024));</div>
<div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;    <span class="keywordtype">bool</span> dir = faiss::gpu::randBool();</div>
<div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;</div>
<div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;    testForSize(rows, cols, k, dir, <span class="keyword">false</span>);</div>
<div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;  }</div>
<div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;}</div>
<div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;</div>
<div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;<span class="comment">// Test for k = 1</span></div>
<div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;TEST(TestGpuSelect, test1) {</div>
<div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; 5; ++i) {</div>
<div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;    <span class="keywordtype">int</span> rows = faiss::gpu::randVal(10, 100);</div>
<div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;    <span class="keywordtype">int</span> cols = faiss::gpu::randVal(1, 30000);</div>
<div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;    <span class="keywordtype">bool</span> dir = faiss::gpu::randBool();</div>
<div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;</div>
<div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;    testForSize(rows, cols, 1, dir, <span class="keyword">false</span>);</div>
<div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;  }</div>
<div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;}</div>
<div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;</div>
<div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;<span class="comment">// Test for where k = #cols exactly (we are returning all the values,</span></div>
<div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;<span class="comment">// just sorted)</span></div>
<div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;TEST(TestGpuSelect, testExact) {</div>
<div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160;  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; 5; ++i) {</div>
<div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;    <span class="keywordtype">int</span> rows = faiss::gpu::randVal(10, 100);</div>
<div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160;    <span class="keywordtype">int</span> cols = faiss::gpu::randVal(1, 1024);</div>
<div class="line"><a name="l00148"></a><span class="lineno">  148</span>&#160;    <span class="keywordtype">bool</span> dir = faiss::gpu::randBool();</div>
<div class="line"><a name="l00149"></a><span class="lineno">  149</span>&#160;</div>
<div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;    testForSize(rows, cols, cols, dir, <span class="keyword">false</span>);</div>
<div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;  }</div>
<div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;}</div>
<div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;</div>
<div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;<span class="comment">// General test</span></div>
<div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;TEST(TestGpuSelect, testWarp) {</div>
<div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; 10; ++i) {</div>
<div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160;    <span class="keywordtype">int</span> rows = faiss::gpu::randVal(10, 100);</div>
<div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;    <span class="keywordtype">int</span> cols = faiss::gpu::randVal(1, 30000);</div>
<div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;    <span class="keywordtype">int</span> k = std::min(cols, faiss::gpu::randVal(1, 1024));</div>
<div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;    <span class="keywordtype">bool</span> dir = faiss::gpu::randBool();</div>
<div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;</div>
<div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;    testForSize(rows, cols, k, dir, <span class="keyword">true</span>);</div>
<div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;  }</div>
<div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;}</div>
<div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;</div>
<div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;<span class="comment">// Test for k = 1</span></div>
<div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;TEST(TestGpuSelect, test1Warp) {</div>
<div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; 5; ++i) {</div>
<div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;    <span class="keywordtype">int</span> rows = faiss::gpu::randVal(10, 100);</div>
<div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;    <span class="keywordtype">int</span> cols = faiss::gpu::randVal(1, 30000);</div>
<div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;    <span class="keywordtype">bool</span> dir = faiss::gpu::randBool();</div>
<div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;</div>
<div class="line"><a name="l00173"></a><span class="lineno">  173</span>&#160;    testForSize(rows, cols, 1, dir, <span class="keyword">true</span>);</div>
<div class="line"><a name="l00174"></a><span class="lineno">  174</span>&#160;  }</div>
<div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160;}</div>
<div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;</div>
<div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160;<span class="comment">// Test for where k = #cols exactly (we are returning all the values,</span></div>
<div class="line"><a name="l00178"></a><span class="lineno">  178</span>&#160;<span class="comment">// just sorted)</span></div>
<div class="line"><a name="l00179"></a><span class="lineno">  179</span>&#160;TEST(TestGpuSelect, testExactWarp) {</div>
<div class="line"><a name="l00180"></a><span class="lineno">  180</span>&#160;  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; 5; ++i) {</div>
<div class="line"><a name="l00181"></a><span class="lineno">  181</span>&#160;    <span class="keywordtype">int</span> rows = faiss::gpu::randVal(10, 100);</div>
<div class="line"><a name="l00182"></a><span class="lineno">  182</span>&#160;    <span class="keywordtype">int</span> cols = faiss::gpu::randVal(1, 1024);</div>
<div class="line"><a name="l00183"></a><span class="lineno">  183</span>&#160;    <span class="keywordtype">bool</span> dir = faiss::gpu::randBool();</div>
<div class="line"><a name="l00184"></a><span class="lineno">  184</span>&#160;</div>
<div class="line"><a name="l00185"></a><span class="lineno">  185</span>&#160;    testForSize(rows, cols, cols, dir, <span class="keyword">true</span>);</div>
<div class="line"><a name="l00186"></a><span class="lineno">  186</span>&#160;  }</div>
<div class="line"><a name="l00187"></a><span class="lineno">  187</span>&#160;}</div>
<div class="ttc" id="classfaiss_1_1gpu_1_1HostTensor_html"><div class="ttname"><a href="classfaiss_1_1gpu_1_1HostTensor.html">faiss::gpu::HostTensor</a></div><div class="ttdef"><b>Definition:</b> <a href="HostTensor_8cuh_source.html#l00022">HostTensor.cuh:22</a></div></div>
<div class="ttc" id="classfaiss_1_1gpu_1_1DeviceTensor_html"><div class="ttname"><a href="classfaiss_1_1gpu_1_1DeviceTensor.html">faiss::gpu::DeviceTensor&lt; float, 2, true &gt;</a></div></div>
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